Two-piece metal capsule for accommodating pharmaceutical preparations for powder inhalers

Abstract

The invention relates to novel two-piece metal capsules for accommodating pharmaceutical preparations to be used in powder inhalers as well as a method for producing said capsule. The inventive capsules are particularly impermeable to steam and oxygen.

1 . Capsule for pharmaceutical preparations for use in powder inhalers consisting of a capsule trough and a capsule cover which are both made of the same material and can be joined together in such a way as to form a stable sealed cavity of defined volume, characterised in that the capsule material is a metal. 
     
     
         2 . Capsule according to  claim 1 , characterised in that the capsule trough and capsule cover have elevations and depressions at their edges the shapes of which are matched to one another and which can be fixed to one another by means of tools. 
     
     
         3 . Capsule according to  claim 2 , characterised in that the tools are cooling members. 
     
     
         4 . Capsule according to  claim 1 , characterised in that the metal is a stainless steel or a cupreous metal. 
     
     
         5 . Capsule according to  claim 1 , characterised in that the wall thickness of the cover and trough is 0.02 to 0.2 mm. 
     
     
         6 . Capsule according to  claim 1 , characterised in that the diameter of the capsule is 3 to 15 mm and the height is 1 to 5 mm. 
     
     
         7 . Capsule according to  claim 5 , characterised in that the wall thickness is 0.05 mm. 
     
     
         8 . A method of sealing a capsule according to  claim 1 , comprising sealing of the capsule trough with the capsule cover by welding, pressing, flanging or soldering.